检索结果-内蒙古大学图书馆

apgv 2005: 2nd symposium on applied perception in graphics and visualization

ISBN: (纸本)1595931392

The proceedings contain 30 papers. The topics discussed include: visibility of temporal blur on a gaze-contingent display;layered motion field visualization: perceptual issues;perceptually optimizing textures for layered surfaces;measuring vection in a large screen virtual environment;exploring perceptual equivalence between real and simulated imagery;auxiliary object knowledge influences visually-guided interception behavior;seamless perceptual morphing using continuous hybrids, recognizing novel deforming objects;de-emphasis of distracting image regions using texture power maps;virtual and real visual depth;a closer look at texture metrics;and usability issues in transfer function specification for volume rendering.

关键词： Computer graphics

来源：评论

学校读者我要写书评

暂无评论

Proceedings - apgv 2005: 2nd symposium on applied perception in graphics and visualization: Preface

Proceedings - APGV 2005: 2nd Symposium on Applied Perception...

引用

Proceedings - apgv 2005: 2nd symposium on applied perception in graphics and visualization 2005年 7-7页

作者： Bulthoff, Heinrich H. Troscianko, Tom Max-Planck Institute for Biological Cybernetics Tübingen Germany University of Bristol United Kingdom

No abstract available

ISBN: (纸本)1595931392

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Step synchronization and third person speed perception in virtual environment locomotion simulators 09

Step synchronization and third person speed perception in vi...

引用

apgv 2009: symposium on applied perception in graphics and visualization

作者： Lehtinen, Sonja Cheung, Clara Pelah, Adar Cameron, Jonathan Lasenby, Joan University of Cambridge United Kingdom University of York United Kingdom

ISBN: (纸本)9781605587431

Human locomotion is known to be influenced by observation of another person's gait. For example, athletes often synchronize their step in long distance races. However, how interaction with a virtual runner affects the gait of a real runner has not been studied. We investigated this by creating an illusion of running behind a virtual model (VM) using a treadmill and large screen virtual environment showing a video of a VM. We looked at step synchronization between the real and virtual runner and at the role of the step frequency (SF) in the real runner's perception of VM speed. We found that subjects match VM SF when asked to match VM speed with their own (Figure 1). This indicates step synchronization may be a strategy of speed matching or speed perception. Subjects chose higher speeds when VMSF was higher (though VM was 12km/h in all videos). This effect was more pronounced when the speed estimate was rated verbally while standing still. (Figure 2). This may due to correlated physical activity affecting the perception of VM speed [Jacobs et al. 2005];or step synchronization altering the subjects' perception of self speed [Durgin et al. 2007]. Our findings indicate that third person activity in a collaborative virtual locomotive environment can have a pronounced effect on an observer's gait activity and their perceptual judgments of the activity of others: the SF of others (virtual or real) can potentially influence one's perception of self speed and lead to changes in speed and SF. A better understanding of the underlying mechanisms would support the design of more compelling virtual trainers and may be instructive for competitive athletics in the real world. © 2009 ACM.

关键词： Virtual reality

来源：评论

学校读者我要写书评

暂无评论

2-1/2D texture mapping: Real-time perceptual surface roughening 07

2-1/2D texture mapping: Real-time perceptual surface roughen...

引用

apgv 2007: 4th symposium on applied perception in graphics and visualization

作者： Pont, Sylvia C. Sen, Pradeep Hanrahan, Pat Helmholtz Institute Utrecht University Advanced Graphics Lab. University of New Mexico Stanford University

ISBN: (纸本)159593670X

We applied fundamental perceptual and physico-mathematical studies to a fast method for luminance remapping of 2D texture maps which enhances perceived surface roughness in comparison with conventional 2D texture mapping. The fundamental physical mechanism underlying the method is the fact that texture contrast increases as the incident illumination tends towards grazing for rough matte surfaces, actually exploding near the shadow edge [Pont and Koenderink 2005]. A psychophysical study by Ho et al. [Ho et al. 2006] confirmed that human observers use texture contrast as a cue for relief-depth or surface roughness. Thus, 2D texture-mapped objects will appear to have a rougher surface if the texture contrast is increased as a function of the local illumination angle. In particular, we increase the bidirectional texture contrast in close accordance with the contrast gradients measured for real objects with rough surfaces. The method presented works well for random textures of locally-matte surfaces if the original texture does not have a contrast that is too high. This modification is in addition to the usual attenuation of the surface irradiance due to the angle of the incident illumination and the computational costs of the technique are similar to that of conventional diffuse shading. This low cost makes it straightforward to implement the technique with real-time shaders which allow interactive rendering on modern graphics hardware. © 2007 ACM.

关键词： Real time systems

来源：评论

学校读者我要写书评

暂无评论

An experimental design for determining the effects of illumination models in particle visualization 05

An experimental design for determining the effects of illumi...

引用

apgv 2005: 2nd symposium on applied perception in graphics and visualization

作者： Gribble, Christiaan P. Parker, Steven G. Scientific Computing and Imaging Institute School of Computing University of Utah United States

No abstract available

ISBN: (纸本)1595931392

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Sketch-based perception model for evaluating color segmentations 05

Sketch-based perception model for evaluating color segmentat...

引用

apgv 2005: 2nd symposium on applied perception in graphics and visualization

作者： Gavilan, David Takahashi, Hiroki Saito, Suguru Nakajima, Masayuki Graduate School of Information Science and Engineering Tokyo Institute of Technology 2-12-1 W8-64 Ookayama Meguro-ku 152-8552 Japan

No abstract available

ISBN: (纸本)1595931392

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

The roles of perception for volume visualization and designing volume visualization methods based on perceptual factors 05

The roles of perception for volume visualization and designi...

引用

apgv 2005: 2nd symposium on applied perception in graphics and visualization

作者： Zhou, Jianlong Institute for Simulation and Graphics University of Magdeburg Germany

ISBN: (纸本)1595931392

In the context of medical volume visualization, it is useful to study how effectively the visualization depicts anatomical structures and how well features of anatomical structures can be discerned in order to make decisions. So it is important to know what factors affect the understanding of rendered images and further to design more effective rendering algorithms under considering these factors. However, they are not fully evaluated. These are important for users to get better understanding of a 3D data set, and to help to develop effective visualization methods. Because visualization renditions are perceived through human visual perception, visual perception has important effects on mental models. This paper aims to analyze the roles of perception for volume visualization and use the perceptual analysis results to design volume visualization methods.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Depth-of-field-based alpha-matte extraction 05

Depth-of-field-based alpha-matte extraction

引用

apgv 2005: 2nd symposium on applied perception in graphics and visualization

作者： Reinhard, Erik Khan, Erum Arif University of Central Florida School of Computer Science University of Central Florida CSB Orlando FL 32816

ISBN: (纸本)1595931392

In compositing applications, objects depicted in images frequently have to be separated from their background, so that they can be placed in a new environment. Alpha mattes are important tools aiding the selection of objects, but cannot normally be created in a fully automatic way. We present an algorithm that requires as input two images - one where the object is in focus, and one where the background is in focus - and then automatically produces an alpha matte indicating which pixels belong to the object. This algorithm is inspired by human visual processing and involves nonlinear response compression, center-surround mechanisms as well as a filling-in stage. The output can then be refined with standard computer vision techniques. Copyright © 2005 by the Association for Computing Machinery, Inc.

关键词： Sensory perception

来源：评论

学校读者我要写书评

暂无评论

Perceptually optimizing textures for layered surfaces 05

Perceptually optimizing textures for layered surfaces

引用

apgv 2005: 2nd symposium on applied perception in graphics and visualization

作者： Bair, Alethea House, Donald Ware, Colin Texas A and M University University of New Hampshire

ISBN: (纸本)1595931392

In this paper, we take a new look at the problem of texturing surfaces so that they can be displayed layered over each other but remain clearly visible. Finding optimal textures that solve this problem is complex because of the perceptual interactions between the visual effects of parameters controlling texture generation. Instead of using controlled experiments to investigate this problem, we use a genetic algorithm based human-in-the-loop parameter space search to build a large database of human-rated textures. This database is then analyzed with a variety of data-mining techniques, including clustering, principle component analysis, neural networks, and histogram analysis. We detail this analysis, concluding with a set of guidelines for building strong layered surface textures, and a display of a number of example textures. Copyright © 2005 by the Association for Computing Machinery, Inc.

关键词： Sensory perception

来源：评论

学校读者我要写书评

暂无评论

A perceptual framework for contrast processing of high dynamic range images 05

A perceptual framework for contrast processing of high dynam...

引用

apgv 2005: 2nd symposium on applied perception in graphics and visualization

作者： Mantiuk, Rafal Myszkowski, Karol Seidel, Hans-Peter MPI Informatik

ISBN: (纸本)1595931392

In this work we propose a framework for image processing in a visual response space, in which contrast values directly correlate with their visibility in an image. Our framework involves a transformation of an image from luminance space to a pyramid of low-pass contrast images and then to the visual response space. After modifying response values, the transformation can be reversed to produce the resulting image. To predict the visibility of suprathreshold contrast, we derive a transducer function for the full range of contrast levels that can be found in High Dynamic Range images. We show that a complex contrast compression operation, which preserves textures of small contrast, is reduced to a linear scaling in the proposed visual response space. Copyright © 2005 by the Association for Computing Machinery, Inc.

关键词： Sensory perception

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：